Свято-Троицкий Измайловский собор в Санкт-Петербурге. The Trinity Cathedral (Russian: Троицкий собор, Troitsky sobor; Russian: Троице-Измайловский соборTroitse-Izmailovsky sobor), sometimes called the Troitsky Cathedral, in Saint Petersburg, Russia, is a late example of the Empire style, built between 1828 and 1835 to a design by Vasily Stasov. It is located due south of the Admiralty on Izmaylovskiy Prospekt, not far from the Tekhnologichesky Institut Metro station.